BQ25858-Q1数据手册TI中文资料规格书

描述 Description

BQ25858-Q1, BQ25858B-Q1 are automotive grade, wide input voltage, bidirectional switched-mode buck-boost controllers. The devices offer high-efficiency regulation over a wide voltage range with output CC-CV control. The devices integrate all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the devices draw power from the output supply and regulate the input terminal voltage with an added constant current loop for protection.

Besides the I2C host-controlled mode, the device also supports programmable hardware limits. Input current, and output current regulation targets can be set with single resistor on the IIN, and IOUT pins, respectively. By default, the device is programmed to provide 5V output, and the target output voltage can be adjusted via the VOUT_REG register bits.

特性 Features

AEC-Q100 qualified for automotive applications

Temperature grade 1: −40ºC ≤ TA≤ 150ºC



Wide input voltage operating range: 4.4V to 65V with 20mV/step

Synchronous buck-boost DC/DC controller with NFET drivers

Adjustable fSW from 200kHz to 600kHz

Switching frequency dithering for EMI noise reduction (DRSS)

Optional synchronization to external clock

Integrated loop compensation with soft start

Selectable PFM operation for light load efficiency improvement (PFM or forced PWM option)

Optional gate driver supply input for optimized efficiency



Support USB-PD Extended Power Range (EPR) in forward and reverse power direction

Adjustable output voltage regulation from 3.3V to 60V with 20mV/step

Adjustable input and output current regulation (RAC_SNS, ROUT_SNS) from 400mA to 20A with 50mA/step using 5mΩ resistor



Bypass mode for highest efficiency with VOUT = VAC

Buck-only mode

High accuracy

±2% output voltage regulation

±3% output/input current regulation

±2% input voltage regulation



I2C controlled for optimal system performance with resistor-programmable option

Hardware adjustable input and output current limits



Integrated 16-bit ADC for voltage, current, and temperature monitoring

High safety integration

Adjustable input overvoltage and undervoltage protection

Output overvoltage and overcurrent protection

Thermal shutdown



Status outputs

Input power present status (PG)

Switcher operation status (STAT)



Package

36-pin 5mm × 6mm QFN with wettable flanks